# US 11,998,450 B2 · Systems and methods of forming orthopaedic implants including printed augments

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- Number: US 11,998,450 B2
- Document ID: US11998450B2
- Status: Granted
- Kind: B2
- Application number: 17/203,988
- Filed: 2021-03-17
- Published: 2021-10-07
- Granted: 2024-06-04
- Earliest claimed: 2020-04-01
- Assignees: Arthrex, Inc.
- Applicants: Arthrex, Inc.
- Inventors: Nick Metcalfe; Michael Moreland; Chris Cronin
- Web page: https://patentgrep.com/patent/US11998450B2

## CPC

- A61F 2/30942: {for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques}
- A61F 2/30734: {Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect}
- A61F 2/30749: {Fixation appliances for connecting prostheses to the body}
- A61F 2/30771: {applied in original prostheses, e.g. holes or grooves}
- A61F 2/4081: {Glenoid components, e.g. cups}
- B33Y 80/00: Products made by additive manufacturing
- A61F 2002/30011: {differing in porosity}
- A61F 2002/30062: {(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive}
- A61F 2002/30332: {Conically- or frustoconically-shaped protrusion and recess}
- A61F 2002/30433: {using additional screws, bolts, dowels, rivets or washers e.g. connecting screws}
- A61F 2002/30604: {modular}
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30736: {Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect}
- A61F 2002/3092: {having an open-celled or open-pored structure}
- A61F 2002/3093: {for promoting ingrowth of bone tissue}
- A61F 2002/30948: {using computerized tomography, i.e. CT scans}
- A61F 2002/30952: {using CAD-CAM techniques or NC-techniques}
- A61F 2002/30985: {using three dimensional printing [3DP]}
- A61F 2002/4085: {having a convex shape, e.g. hemispherical heads}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

This disclosure relates to orthopaedic implants and methods for repairing bone defects and restoring functionality to a joint. The implants and methods disclosed herein include augments formed on respective baseplates. The augments may have geometries that may approximate a surface contour or bone void along a surgical site.

## Claims

### Claim 1

A method of forming an orthopaedic implant for implanting in a patient comprising:
defining an augment volume associated with a respective baseplate, wherein the baseplate includes a plate body extending between front and rear faces and includes at least one plate aperture extending along an aperture axis between the front and rear faces, and wherein a void space in the augment volume is defined along a trajectory of the aperture axis;
printing an augment on the rear face of the respective baseplate according to the augment volume such that at least one augment aperture is established in the void space along the trajectory of the respective aperture axis, including moving a printing head across the rear face;
positioning the respective baseplate in a fixture such that the rear face is exposed; and
repeating the defining and printing steps for a first set of baseplates, and wherein the positioning step includes positioning the first set of baseplates at respective locations along the fixture.

### Claim 2 (depends on 1)

The method as recited in claim 1, wherein the at least one plate aperture includes a plurality of plate apertures distributed along the rear face, and the at least one augment aperture includes a plurality of augment apertures aligned with respective ones of the plate apertures.

### Claim 3 (depends on 2)

The method as recited in claim 2, wherein each of the plate apertures and a respective one of the augment apertures is dimensioned to receive a common fastener along the respective plate aperture axis.

### Claim 4 (depends on 2)

The method as recited in claim 2, wherein the printing step includes establishing an augment body of the augment along the rear face and establishing an anchoring stem of the augment that extends outwardly from the augment body.

### Claim 5 (depends on 4)

The method as recited in claim 4, wherein the printing step occurs such that the augment apertures are circumferentially distributed about a longitudinal axis of the anchoring stem.

### Claim 6 (depends on 1)

The method as recited in claim 1, wherein the printing step occurs such that at least a portion of a medial face of the augment is transverse to the rear face, and the at least one augment aperture extends between the portion of the medial face and a lateral face of the augment disposed along the rear face of the plate body.

### Claim 7 (depends on 6)

The method as recited in claim 6, wherein the rear face has a substantially planar geometry, and the aperture axis is non-perpendicular to the rear face.

### Claim 8 (depends on 1)

The method as recited in claim 1, wherein the augment volume is defined between the rear face of the respective baseplate and a predefined surface contour of a bone surface.

### Claim 9 (depends on 8)

The method as recited in claim 8, further comprising determining the predefined surface contour prior to the defining step, wherein the predefined surface contour is a patient-specific surface contour of a glenoid face.

### Claim 10 (depends on 1)

The method as recited in claim 1, wherein the rear face has a substantially planar geometry.

### Claim 11 (depends on 1)

The method as recited in claim 1, wherein the defining step occurs such that the augment volume associated with a baseplate of the first set of baseplates differs from the augment volume associated with another baseplate of the first set of baseplates.

### Claim 12 (depends on 11)

The method as recited in claim 11, further comprising repeating the defining and printing steps for a second set of baseplates, the positioning step includes positioning the second set of baseplates at respective locations along the fixture, and the defining step occurs such that the augment volume is common to each augment corresponding to the second set of baseplates.

### Claim 13 (depends on 1)

The method as recited in claim 1, wherein the plate body comprises a first material, the augment comprises a second material, and the printing step occurs such that a porosity of the second material differs from a porosity of the first material.

### Claim 14 (depends on 13)

The method as recited in claim 13, wherein the printing step occurs such that augment includes a porous scaffold having an interconnected network of branches and nodes.

### Claim 15 (depends on 14)

The method as recited in claim 14, further comprising positioning biological material in the porous scaffold.

### Claim 16 (depends on 15)

The method as recited in claim 15, wherein the step of positioning the biological material in the porous scaffold includes printing the biological material in cavities established between the branches and the nodes of the porous scaffold.

### Claim 17 (depends on 13)

The method as recited in claim 13, wherein the first material of the plate body is a metallic material.

### Claim 18 (depends on 17)

The method as recited in claim 17, wherein the first material and the second material differ from each other in composition.

### Claim 19 (depends on 1)

The method as recited in claim 1, further comprising securing a glenosphere to the plate body adjacent to the front face, wherein the glenosphere includes an articulating surface having a generally convex geometry.

### Claim 20 (depends on 19)

The method as recited in claim 19, wherein the glenosphere includes a recess dimensioned to at least partially receive the plate body, the plate body includes a mounting portion establishing the front face, and a perimeter of the mounting portion is dimensioned to cooperate with a perimeter of the recess to establish a Morse taper connection.